I don't know if this is useful, but in Econ 101 we were told that the "household" is the economic unit, not the individual. What you mention was given as the re

I don't know if this is useful, but in Econ 101 we were told that the "household" is the economic unit, not the individual. What you mention was given as the reason. That was 4 decades ago, and I don't know if it was or is the mainstream view.